19217775

素因数分解:

$3^1\times 5^2\times {\mathrm{43}}^1\times {\mathrm{59}}^1\times {\mathrm{101}}^1$

素因数の和:216

約数の個数: 48

約数和(自身を含む): 33390720

約数和(自身を除く): 14172945

約数列:

[1, 3, 5, 15, 25, 43, 59, 75, 101, 129, 177, 215, 295, 303, 505, 645, 885, 1075, 1475, 1515, 2525, 2537, 3225, 4343, 4425, 5959, 7575, 7611, 12685, 13029, 17877, 21715, 29795, 38055, 63425, 65145, 89385, 108575, 148975, 190275, 256237, 325725, 446925, 768711, 1281185, 3843555, 6405925, 19217775]

約数ペア:

[(1, 19217775), (3, 6405925), (5, 3843555), (15, 1281185), (25, 768711), (43, 446925), (59, 325725), (75, 256237), (101, 190275), (129, 148975), (177, 108575), (215, 89385), (295, 65145), (303, 63425), (505, 38055), (645, 29795), (885, 21715), (1075, 17877), (1475, 13029), (1515, 12685), (2525, 7611), (2537, 7575), (3225, 5959), (4343, 4425)]